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George and Harold, and their doubles, Yesterday George and Yesterday Harold, have a good thing going. Two of them go to school, while the other two hide in the tree house and play video games all day-then they switch! But when their malicious gym teacher, Mr. Meaner, creates a method of mind control that turns their fellow students into attentive, obedient, perfect children, the future of all humanity will be in their hands!
10) Jabari tries
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Jabari is making a flying machine all by himself, but when it doesn't work the way he imagined, he learns about perserverance and problem-solving.
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Self-driving cars are a Modern Engineering Marvel! In this engaging title, readers will explore the history of cars from early steam-powered wagons to toady's luxury sedans. The father of Self-Driving Cars, Sebastian Thrun, is featured, and a colorful infographic shows how a Google Car works. Readers will learn about advancements in computer technology that made cars more automated and how car companies are continuing to expand the capabilities of...
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Learn about inventors and their amazing inventions. What are your eight favorite inventions, and who were the persevering minds behind them? In a style as vivacious and accessible as ever, Marcia Williams honors the fine folks who brought us the printing press, the steam condenser, the steam train, the electric light, all of them stepping stones to ever more awesome inventions to come. Interspersed are brief snapshots of more than a hundred other...
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During the 1800s, things changed quickly. People were finding ways to make things faster and cheaper. People were finding new ways to do other things, too. Inventors played an important part in these changes. They found new ways to travel. They came up with new ways to send messages to each other. They even found a way to light up the night.